+(*)Change the remapping dzInterface argument sign #61
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Changed the name and sign convention for the dzInterface argument to remap_all_state_vars to reflect the convention used in the regridding code and to reflect the fact that this is always a vertical displacement. This change eliminates a subtle array-syntax whole-array multiplication (by -1.) in one call to remap_all_state_vars (this clearly violated MOM6 code standards), and it corrects an actual sign error that will change answers (perhaps from a state of catastrophic failure) in the code for the REGRID_ACCELERATE_INIT=True option if REMAP_UV_USING_OLD_ALG is also true and the initial velocities that are being remapped are non-zero. Also added comments describing the real variables inside of remap_all_state_vars to help clarify what they do. Fortunately the situation where answers change seems like a very uncommon combination of settings (it is possible that no one has ever tried this), and all answers in the MOM6-examples test suite are bitwise identical.
Codecov Report
@@ Coverage Diff @@
## dev/gfdl #61 +/- ##
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- Coverage 28.95% 28.94% -0.01%
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Files 242 242
Lines 71556 71553 -3
============================================
- Hits 20716 20714 -2
+ Misses 50840 50839 -1
Continue to review full report at Codecov.
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Gaea regression: https://gitlab.gfdl.noaa.gov/ogrp/MOM6/-/pipelines/14641 ✔️ |
marshallward
approved these changes
Jan 24, 2022
This was referenced Jan 29, 2022
Hallberg-NOAA
added
answer-changing
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Changed the name and sign convention for the dzInterface argument to
remap_all_state_vars to reflect the convention used in the regridding code and
to reflect the fact that this is always a vertical displacement. This change
eliminates a subtle array-syntax whole-array multiplication (by -1.) in one call
to remap_all_state_vars (this clearly violated MOM6 code standards), and it
corrects an actual sign error that will change answers (perhaps from a state of
catastrophic failure) in the code for the REGRID_ACCELERATE_INIT=True option if
REMAP_UV_USING_OLD_ALG is also true and the initial velocities that are being
remapped are non-zero. Also added comments describing the real variables inside
of remap_all_state_vars to help clarify what they do. Fortunately the situation
where answers change seems like a very uncommon combination of settings (it is
possible that no one has ever tried this), and all answers in the MOM6-examples
test suite are bitwise identical.